Boiler-tube expander.



PATENTED SEPT. a, 1908.

J. W. vPAESSLBRl BOILER TUBE EXPANDBR. APPLIOATION 4FILED JAN. 1s, 1907vjllr wml

lNVEN-roR JOHN W. FAESSLER,

JOHN W. FAESSLER, OF MOBERLY, MISSOURI.

BOILER-TUBE EXPANDER.

Specification of Letters Patent.

Patented Sept. 8, 1908.

Application filed January 18, 1907. Serial No. 352,893.

To all whom 'it may concern.'

Be it known that I, JOHN W. FAEssLER, a citizen of the United States,and resident of Moberly, Randolph county, Missouri, have inventedcertain new and useful Improvements in Boiler-Tube Expanders, of whichthe following is a specification, containing a full, clear, and exactdescription, reference being had to the accompanying drawings, forming apart hereof.

My invention relates to a boiler tube expander, the object of myinvention being to construct a simple, inexpensive and easily operateddevice for expanding the ends of boiler tubes in flue sheets, and thelike.

To the above purposes, my invention consists of certain novel featuresof construction and arrangement of parts, which will be here-v inaftermore fully set forth, pointed out in my claim, and illustrated in theaccompanying drawings, in which i Figure 1 is a plan view of anexpanding tool of my improved construction; Fig. 2 is a vertical sectiontaken on the line 2 2 of Fig.

1 and showing the expander in position in the end of a boiler tube Fig.3 is a transverse section taken on the line 3-3 of Fig. 2; and Fig. 4 isa transverse section taken on the line 4-4 of Fig. 2.

Referring by numerals to the accompanying drawings: 1 designates thebody of my improved tool, which is in the form of a cylindrical block,through the center of which is formed a circular opening 2, and formedintegral with the rear end of this block is an outwardly projectinglange 3.

Formed in the body of the block, at equal distances 'apart andconnecting with -the opening through the center thereof, are theradially arranged openings 4, which are occupied by hardened metalrollers 5, and the .rear ends of said rollers being provided withcylindrical stems 6. The openings 4 are formed at slight angles relativethe opening 2 through the center of the .block 1, and thus the rollers 5are maintained at slight angles, and when the tool is rotated saidrollers will feed into or out of the end of the tube which is beingexpanded, depending on the direction of the rotation of said tool.

Loosely arranged on the rear portion of the block 1 inclosing the stems6 and bearing .against the ange 3 is a ring 7, which, when the tool isin operation, forms a step to limit the movement thereof in the boilertube.

Adapted to enter the opening 2 and to is a gradually tapered spindle 8,provided on its rear end with an integral head 9, which is perforated asAdesignated by 10 in order to receive the pin or bar 11, by means ofwhich the spindle is rotated.

When a tool of my improved construction is in operation, the forward endthereof is inserted in the end of the boiler tube, after which thespindle 8 is passed through the opening 2, thus causing the rollers 5 tobe forced outwardly against that portion of the boiler tube adjacent thesheet, and the bar 1 1 is now engaged and manipulated so as to rotatethe spindle, and at the same time said spindle is forced inwardly withconsiderable pressure. This action presses the rollers outwardly againstthe boiler tube and as a result ofthe friction due to the pressure, therollers, together with the tubular head 1, will rotate with the spindle8, and said rollers 5 being set at a slight angle will gradually feedinto the end of the boiler tube and as the spindle is continuallyforcing said rollers outwardly, this action expands the end of the tubein the sheet. As soon as the end of the tube has been suflicientlyexpanded, the spindle 8 is withdrawn from the tubular head 1, whichaction releases the pressure on the rollers 5 and the entire device isnow removed from the end of the boiler tube.

The ring 7 acts as a stop to limit the forward movement of thecylindrical head and Aalso serves as a bearing for the stems 6 on therear ends of the rollers 5.

A tool of my improved construction is very simple, inexpensive, easilyoperated, and is very eective in the expanding of the ends of boilertubes.

I claim:

The herein described boiler tube expander, comprising the cylindricalbody 1, through the center of which is formed a longitudinally disposedopening, the flange 3 formed integral with the rear end of the body 1,there being a series of radially arranged openings 4 formed through thebody and communicating with the opening therethrough, the ring 7 looselymounted on the rear portion of the body and inclosing the rear portionsof the radially arranged openings and which ring is of the same diameteras isthe flangey on the rear end of the body, the rollers 5 looselyarranged in the radially arranged openings, the rear ends of whichrollers bear against the front face of the ring, the stems 6 integralforce the rollers 5 outwardly against the tube with the rollers, whichstems bear against the naine to this specification, in presence of tWoinner periphery of the ring, a tapered spindle subscribing Witnesses.adapted to pass through the opening in the v cylindrical head and engageall of the rollers, JOHN W' FAESSLER' 5 and a handle detaohably appliedto the outer Witnesses:

end of the spindle. GEO. W. SPARKS,

'In testimony whereof, I have signed my JOHN W. SCOTT.

